英语翻译A rapid –mixing basin is to be designed for a water coag

英语翻译
a rapid –mixing basin is to be designed for a water coagulation plant,and the design flow for the basin is 4.0 mgd.the basin is to be square with a depth equal to 1.25 times the width.the velocity gradient is to be 900 sec¯¹(at 50 ºf),and the detention time is 30 sec.determine:
a.the basin dimensions if increments of 1 in .are used.
b.the input horsepower required.
c.the impeller speed if a vane-disc impeller with six flat blades is employed and the *** is baffled .the impeller diameter is to be 50% of the basin width.